The 44-year-old reality TV star revealed the news to the public as the Blink-182 drummer performed on stage at his concert by holding up a sign that read: ‘Travis, I’m Pregnant.’
It’s a nod to the band’s iconic All The Small Things music video, in which a similar sign appears.
After catching a glimpse of his wife’s message, Travis jumped down off the stage, made his way towards her and the couple shared a passionate kiss.
She later confirmed the news on her Instagram Story by sharing a video of the surprise reveal.
She already shares three children — Mason, 13, Penelope, 10, and Reign, eight — with ex-boyfriend Scott Disick, 39.
Travis has two children — Landon, 29, and Alabama, 17 — with his ex-wife Shanna Moakler, 48.
Fans of the couple shared their congratulations in the comments, having speculated that Kourtney has been pregnant for some time now.
One person wrote: ‘Congratulations. Love the announcement.’
Another added: ‘Looks like she’s been pregnant and this is their big announcement after some time to see if baby is healthy! I wish them well and Kourt & baby healthy journey!’
A third person commented: ‘The cutest announcement ever, congrats to these incredible soulmates.’
‘I’d say this is the “public” notice of the pregnancy as she looks 3-5 months,’ another added.
MailOnline has contacted Kourtney and Travis’ representatives for comment.
Kourtney and Travis became romantically involved in late 2020 after nearly a decade of friendship.
They made their relationship Instagram official in February 2021 and were engaged by that October.
Congratulations Kourtney and Travis!